Adds compilers and minimal unit tests for transform sections bksp,
finl, ordr, and tran, and cleans up problems in the corresponding
builders.
Adds a utility script for building test fixtures for manual analysis:
./build.sh build-fixtures
Refactors constants to give us design-time type safety once more.
Adds definitions for LDML keyboard transform elements `transforms`,
`backspaces`, and `reorders`, and the binary format sections `bksp`,
`elem`, `finl`, `ordr`, and `tran`.
Minimally updates the compiler so that it will build, but no other
changes to the compiler.
Compiler and Typescript updates to support building these sections will
come in the next PR.
Updates compiler, headers and documentation for the 'name' section,
which will always be present as the LDML keyboard spec requires at least
one name in the `<names>` element.
- checkin spec to repo
- new header: kmx_plus.h with data access structs and functions
- static asserts to validate header sizes
- early validation of data
- internal dump of kmx+ data
